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Growing Lettuce With Different PH Levels
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- Опубликовано: 12 янв 2019
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Lettuce doesn't tend to show nutrient deficiencies quite the same as other plants. Lack of nitrogen usually results in less growth rather than noticeable yellowing leaves. Also, in case anyone is wondering why the PH levels came out the way they did...Carbonic acid doesn't really take hold very quickly in the Kratky method. If the water is aerated however, then the PH tends to drop more easily. Another reason is likely due to tap water containing larger molecules of calcium carbonate and isn't really adsorbed by the plants, so as long as is a fair amount of PH buffer in the water, it will tend to stay neutral.
For some interesting growing tips and tricks, try this link
comfyhomecorne...
You forgot the most important test.. Taste. Thanks for all the info.
Love the fact that you are using grams! Makes it much easier for us (the rest of the world) to understand! Again, thank you
That's normal when working with chemistry. Even the us does that. Jeez
@@LXW-Arts ?
Thank you for mentioning that I use the metric system because I don't understand the type of measurements Americans use.
Nice experiment, thank you for that. But one note: it is not possible to say it is significantly different or not, since you had only one plant and one experiment. You would need at least 3 plants of each pH (best in separate containers) and repeat it 3 times. That way you could do some statistical test (T-test, ANOVA...) to inffer the SIGNIFICANT differences. 12% diff in head mass and 15% in root mass looks pretty simmilar to me. Also it would be good idea to completely dry your samples before you wieght them. But still thanks for your effort.
Great videos as usual! The sad part of the hydroponic diy videos on the net is most are focused on medical grows which not all of us are into. Granted I have done those grows myself but it's nice to be able to use the same concepts but with a different outcome. Your videos are very informative for those who choose to grow food for themselves. Your videos always include in depth conclusions and don't just sit there showing off your plants like most.
you should try out Jeb Gardener. Not only will he show constant experimentation with food crops, but he is absolutely wonderful to watch. His editing and music are always fun.
Agreed, and cannabis has a very different nutrient profile from something like basil or lettuce.
@Dying Moths: I love Jeb but think he's better as entertainment. mhpgardener has a lot of information but he did it when cameras weren't near what they are today so the quality suffers.
I know this is an old video, but it has caused me to dig some more into your channel. Very much appreciate your no-nonsense delivery.
These type of experiments are so good, keep them coming!!
Good experiment. Remember it is only a n of 1. So you would need to repeat this multiple times to get a true picture.
You may find that high pH does not always have heavier root mass.
No you do it...
@@mindful_minipods no u
What's important is the amount of stress the plant goes through in order to absorb it's required nutrients. The recommended 5.5 - 6.5 pH for growing lettuce and most bracicas makes it easier on the plant to absorb as many nutrients as possible during it's life span. Usually results in a healthier, tastier vegetation.
When I grow lettuce using the Kratky method I use nutrients at half strength (about 800 ppm). The lettuce has much less tip burn.
This was helpful!
600 PPm means how much EC ?
@@narohit yes
@@narohit 1,2
Ppm and size matter the less plant matter the less feed they need try and keep it low and go up at 25 at a time ppm
I don't grow lettuce but your video gave several bits of info that Explains some of the problems I've had! Your explanations and reasonings are exactly what I would expect from a video of this type. I just subscribed!
Love your very scientific approach to your experiments. Thanks for sharing your expertise. Bravo!
I use white vinegar or distillate and it's works perfect if ya drop ya water to 5.5 it will rise slowly and allow all nutrition to be available
You should get a refractometer and test the brix (sugar) levels in each plant that way we can see if a certain ph or ppm makes a difference on flavor.
Nice call. Brix is the trix
@@northeastslingshot1664 yea, higher mineral content and sugar content should mean much healthier and tastier food. They look the same or close with your eye but when you test it the results may show that one or the other is far superior to the other.
HIBRIXXXXX
The root in High pH are more because the plant is trying to get more nutrients or recover the pH expanding the roots. Low pH do not help plant grow roots, neutral pH, has the perfect pH , and root growth to have more weight in the leaves that is the important we want. Thank this was an awesome experiment!
Very good fair test, impressed by your quick and Precise delivery.
I happened to "like" this almost immediately just because I appreciate you discussing/sharing this. Anyway, right as i liked it when was the audio kicked in a little more. It was like I got an upgrade for liking
What a great little test! Thanks for sharing your results with the rest of us!
I remember seeing a video a few years back and I could've sworn I subscribed, sadly I was mistaken. I've made sure to subscribe this time around. Thanks!
Very helpful, especially in my case i dont check for my pH, because im only growing leafy greens and in small batches, for my takeaway if your growing in a commercial scale the weight will be significant because of the quantity, but if your just growing for consumption pH balancing is optional.
Cube Root Farming sort of. If you run aeration, then the ph can drop easily and become fairly acidic rather quickly. That can lead to root rot. Although much of the time having extra oxygen at the roots combats the anaerobic bacteria that is associated with rotting. It usually just means that you have to change out the solution once or twice.
Why include aeration when im just growing green leafy? Kratky system is best for leafy vegetable as per my experience.
How much water does a lettuce need until harvest?
Would a 1.5 litre container work?
SarRyuKen That is going to depend on a few factors. How much air circulation, heat and transpiration. A gallon per plant usually works best for me
Growing Answers - Thanks. Just wanted a rough idea
I ordered butterhead buttercrunch lettuce seed earlier today and was hoping i can grow some in the home under a grow light, but not using hydroponics. The butterheads are getting rather pricey in store...up to $3 per one. The butterheads storage life is better than most and has a more milder less acid effect on the stomach.
very cool scientific experiments. this helps a lot
Did I miss where he measured the Ph after the month? How much carbonic acid was transfered into the water.
One of the best channels I have ever subscribed to. I learned a lot about lights here. Thank you and Keep up the great job!
I like your experiments. If you could make one on co2, I would appreciate. Thanks
i think that the nutrient absortion correlation to pH its only a variable when you are feeding with solid (undisolved) fertilizer because each nutrient will disolve at a different pH if you are using a liquid feeding nutrient solution you dont need to worry about the pH just for the well being of the plant (in order not to burn the root system) please tell me if im wrong im just here learning as everyone else.
I don’t really think it matters whether it’s solid or liquid because it’s all solid at some point. What’s dissolved in solution with the liquid fertilizer will fall out of solution at different pH levels. If I remember correctly with the experiments that I’ve done, is that pH only really matters mostly at the extreme. So for a pH of six or a pH of seven it’s not really going to matter much at all.Some people like to make it dead on when they make their solution. For example 6.3 or 6.5. Between both of those numbers it really doesn’t matter. It doesn’t have to be that perfect. It’s going to adjust itself anyways within a very short time in hydroponics. It will also change with soil but does it more slowly because soil has buffers in it usually. When it comes to growing indoors, nobody is really growing with solid fertilizers. That’s more than a lawn or outdoor garden thing. And really the purpose of that is time release.
these are very cool. the plants put effort into controlling the pH around the roots.
I always wanted to know this, thanks.
Please do another test. PH 5.5, 6.5, 7.0 - it’s been proven that plants have an issue up taking nutrients below 5.5 and above 7.0. I like to see if there is a difference to the plant while it’s with n the correct range, as many seem to really micro focus on what their PH is and will swear to their grave that it’s correct.
If you do think about it, consider adding a control plant. Yes is adding one more plant, but on that plant, let the ph swing naturally, never set it.
Thanks for the vid.
PH is a logarithmic function. so the difference between PH 7 and 6 could be something like half of a drop of acid. maybe fewer!
if you start with those PHs after one or two week you will end up having very similar natural substrate. all of those would settle at 7.2 +- 0.2
Mohammad mohammadi we are not talking about ph swings. We are talking about keeping the water ph at s fixed numbers to see growth results.
I am also unsure how your comment relates to mine. Tester had ph at fixed numbers for all 3, I am saying to do it again but with numbers out side of the useable range.
Good work . As you say variation could be down to genetics , the middle one will get significantly more light . But I don't see how the roots or nutrient can absorb any CO2 it's pretty much a sealed container. Oxygen is available to the roots since it's 20% of the air and small gaps would allow sufficient entry , but no plants want oxygen , they produce it , it's a waste gas to them they want rid off.
if somebody could enlighten me, dont you need to keep the water aerated in the storage tote for the plant to live?
The roots with less N grew the most
Not surprised since cutting root better with less N around
@Growing Answers
_"Another reason is likely due to tap water containing larger molecules of calcium carbonate..."_
All calcium carbonate molecules have the same size (isotopic variation doesn't make any difference in this context). What you tried to say?
Probably meant to say more
I think what he means is that calcium carbonate molecules clump up in tap water whereas in other sources its a bit more dissolved, its true tho, if u dissolve some salts like nacl u will se crystals which indicates clumping of molecules but u can still taste salt in water which means there is a variation of solubility of salts in water, but ofc i can be wrong.
@@jamesdivinagracia1713
Solubility of calcium carbonate depends on pH, temperature and purity of the water.
I think that the 'precipitate' could be sugars released by the roots that'd typically signal myco in the soil.
Sugar wouldn’t precip at that ph.
@@GrowingAnswers i can leave nutrient solution in a bottle for months with 0 precipitation, so that why i question it.
One more question though, did you taste the lettuce? Did they taste different? Which one had the best taste? Would love to know thank you
All the same
You'd really need to test a few rows of lettuce in each pH and average their weights to control for seed variance. Even from the same packet some some seeds do better than others. I also suspect pH effects the availability of nutrients from the soil..and rocks..the whole process of microbes retrieving them in exchange for sugars. I'd think the process if just absorbing it ready nutrients in solution is very different. Lastly, lettuce is a light feeder. It would be interesting to see how a heavy feeder did. I assume the latter needs a wider variety of elements and more of them would be more or less available with the variance in pH.
Great video! I really want to know where you got those containers (reservoirs). They look like exactly what I have been looking for but unable to find.
02:36 the answer.
I grow medical "tomatos" just subscribed. Your videos are very informative. Thank you
Yeah this was very informative for my... Jalapeno grows.. !!
Police will check it out
@@hugonewguy4009 shut up bitch
Thanks for this interesting video. Will be watching much more.
I would redo the experiment and readjust ph to 4.5 6.5 and 8.5 each day like you normally would in a hydroponic unit. Many nutrients contain ph stablizers. I'd rn with Jacks 123, or another professional powdered line that has no stablizers. For instance with some nutrients like sensi grow ph perfect. As soon as you added nutrients to all those tubs the ph in all of them would have gone to 5.8.
Very helpful for a newbie like me.
Great video! Thanks for sharing! You just gained another subscriber!
How to lower ph water, in sistem like "aerogarden", from ph8 to ph 7.5 or ph 7 ? Maybe with something naturaly and safe?
It’d be interesting to see how the EC was affected in each tub as well as the pH.
I think it's pretty obvious. Don't need an EC reading when the proof is in the pudding :)
You have me wanting to try one with high ph say 8 or 8.5 and keep it there
for outdoor dwc to see if it still picks up all minor nutes and thrives with the advantage of less algae growth do to high ph
I gather you did not adjust the pH in each container to keep it at the same level thruout the experiment. This in my novice opinion skewed the results. Good lettuce. Great job within 4 weeks.
I enjoyed the video. Thank you for posting fellow kratky gardener!
EC 1/ 1000 us 2/ 1500 us 3/ 2000
A wonderfull experiment. Thx. 👍
If u do this test again, maybe add a taste test as well. Great video!
Hello! Did you put Pump on it? Or they don't need ? I know that if you don't put air , they grow slowly but can they survive one month? thanks!
No air
thank you for this SCIENCE!
Thanks for the video is very informative.
Maybe do it with more samples?
I was wondering what temperature ranges for the res water is ok for kratky? My growroom gets warm in the summer.
Ideally below 70
Did you rotate the plants or keep them in the same order while growing? Not sure if it would make any difference
Dont need to. Par meter ensures light is the same for each.
this is already 3yrs ago, but can you show the step-by-step procedure of it?
Where do you find the substrate balls?
Wow..tnx for ur experiments..could u tell me what lights u are using! Tnx
All kinds, but all led.
@@GrowingAnswers tnx! Laura
What nutrients did you use? Masterblend? GHE?
did you replace the solution or just 1 time for the whole month
I was just going to start using the ph up and ph down but there’s no ingredients. Not very organic. Just wondering if anyone knows if it’s ok to eat food grown with ph up and ph down
suggestion: you should have tested the TDS level before and after.
I wonder if it would be smarter to grow til maturity with a higher ph and then harvest, then once you do your first harvest you can change it to 6.8~ to have a even stronger harvest? I’d love to see or do a survey on that
Pretty sure I did a video on that already
@@GrowingAnswers awesome! I’ll look for it! And honestly wasn’t really expecting a response 😅
Wow as it turns out, lettuce is very forgiving.
Your "tipburn" as you call it is from lack of air movement. Also when you add PH UP and Down you are adding Phosphate and Potassium...this doesn't help anyone with anything
Very interesting thanks for sharing!
Taste?
Differences in taste?
That's important too.
Gary Green no difference. Sugars are produced in the leaves and since there was no real difference in coloration, they all tasted the same. Most of the time, the only difference in taste you’ll get is from different lighting.
If u wanted to see difference in taste grow TLO , not salt based nutrients .
Growing Answers taste has to do with what u fed the plant. Synthetic has horrible flavor, true live organics has the most pure natural taste . Although growth rates are significantly smaller with organic soil. I prefer flavor over yield when it comes to vegetables.
King Salmon well yes feeding and lighting. But since all the plants were fed the same and had the same lighting, there’s no difference. Typically though when talking about eating the leafy greens and not the fruit of a plant, lighting has a significant impact on leaf taste.
An interesting experiment, cheers.
Good experiment 👏👏👏
very good experiment
Very interesting. I just subscribed
i Use filterized water with calcium oxides and anti acids
wow,,,cant wait to grow lettuce this yr,,,,google charts obviously incorrect in many cases
The graph you showed for nutrient uptake is different than ones I’ve seen for Cannabis. Is the one you showed for lettuce?
JG Photography not sure. It just a general guide really. There’s a common ground when it comes to ph across almost any hydroponics grow. Soil is usually closer to neutral with the exception of a few plants.
what type of soil is this that you are growing these on?
surly there would be a difference, but there is not a difference in these because of the type of the plant but if you have different plants it would change because some plants like more acidic and some like it more alkaline.
Very nice info in this.
Very informative, thanks
I like the idea but..so small containers will make phone fluctuations crazy anyway in dec style you can watch it go from 7.8 to 4 in a day and back up next.. u need at least 50litres to bring ph to stable ranges
What water solution you use.
Do it with clones or it's a complete watse of time, seedlings vary greatly.
how much time elapsed from start to finish?
BlackGaming Hs around a month
@@GrowingAnswers thank you!
This was pretty helpful
What is that spongy pad that you grow seeds in?
And is there a DIY way to make them? or any alternatives?
Foxy rock wool
@@GrowingAnswers Why thank you.
Then the optimal way to feed them would be to alternate between acidic ph and neutral ph with different nutrients, this would be possible in some of those looped systems right?
onlyme0349 I don’t think alternating ph or nutrients is necessary.
@@GrowingAnswers Isn't the point of these tests to get closer to the most ideal way of growing produce?
That's what you would find if you answer all of the questions.
@@onlyme0349 This test was just to show approx optimal ph levels and how bad it would be if the ph shifts by a little bit.
@@GrowingAnswers Thank you for that, this is good, interesting and useful content.
Does this mean that the PH of the water doesn't matter that much as all produced around the same end result, also would this be the same for other produce
Ph within a reasonable range doesn’t seem to produce any difference that matters much to the home grower.
@@GrowingAnswers thanks for the reply, I'm just starting hydroponics, wanting to go Pak Choi on my home made DIY downspout, this PH up and down has me confused and the measurements all seem confusing, I'll just try normal water and nutrients and see how it goes, thanks
Can you do a video on why things might taste bad? I thought it was the ph, so I bought a kit... But it turns out the PH is fine. I've changed the nutes (I actually took some out of their aerogarden as well to see if that helped...) And some still taste bitter. I get lettuce bolting or normally tasting bitter like lolla rossa, but mint, cilantro and parsley? It only happens when they're older, if I eat them when they're microgreen sized they're fine). I've moved them outside to see if sunlight was better.
Younger plants like those mentioned usually taste better. When leaves harden off, they aren’t as desirable. Lighting is also usually to blame when it comes to taste. Wrong spectrum or weak lighting.
@@GrowingAnswers I think getting fancy with spectrum is probably beyond me to be honest... But the problem is the house only has direct sunlight on the back wall (a quirk of the architecture, there are huge windows but they're 20 feet high so there's nowhere to put plants.. ) but inside the light issue is confusing. I figured I'd put them in the pantry (closet ) with a better setup, so they're not on the counter ... but the electrician wants details that I don't know. Is there a basic lighting in a box you recommend to set and forget it? Am I being too vague? (The short response would be, I unfortunately went to an arts charter school, so my science education is seriously lacking... ) Thanks for your quick response.
ScreamToASigh you can get plenty of good led lights from Home Depot.
Little gem of information
- lettuce pun
Why use ceiling insulation and chemicals to grow food?
It’s rock wool. The roots need something to start in. It’s inert. And it’s not chemicals. It’s nutrients. It’s what the plants use in nature after the soil microbes break it down into an adsorbable form. Ur thinking of chemical fertilizers for lawns. And technically even that isn’t really bad. Except maybe too much phosphorus runoff that gets into water supply. But that’s beside the point. The point is that it’s not chemicals, it’s minerals and nutrients in their simplest form that is plant ready. Organic fertilizers are not plant ready. Microbes break down organic compounds (fertilizers) and release it to the plants in what you call (chemical form). It’s all the same.
Nice experiment, How often do you change the water or just increase it?
Erwin Castillo it gets changed when it runs low.
great video, came across this randomly, subbed only 3 mins in.
Did they taste different?
Hello! Could you please put a link to the chart that you inserted at the end of your video in your description as well? Thank you~
Jay Chen google image it. I don’t know specifically the site it came from.
You should have made some replication of your treatments so that data could be accurate.
I think you are good in this kind of video, focus on experiment on hydroponic, consider the title, not so eye catching, and the voice clarity. the structure and ide is great. keep making great video. good luck! waiting for you next video.
You should taste it dear sir. BTW thanks for the video.
look similar, but may not taste similar. Difference between fresh and dry weight may be significant.
What PAR meter do you use again?
great vid brotha